Magnetic-Base Indicator Holder Arm Type Articulating Base Height 55 mm Base Length 60 mm Base Size 60 mm L x 50 mm W x 55 mm H Base Type Magnetic Base Width 50 mm Compatible Indicator Mounts 6 mm Fine Adjustment Position Fine Adjust Top (FAT) Holding Power 800 N Maximum Reach 347.5 mm Step Type V Step Working Length of Post/Lower Arm 163.5 mm Working Length of Snug/Third Arm 71 mm Working Length of Upper Arm 113 mm Base Thread Size M8 x 1 Construction Steel